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Checking the Spark Plug
Important:
Do not clean the spark plug. Always
replace the spark plug when it has a black coating,
worn electrodes, an oily film, or cracks.
Note:
If you see light brown or gray on the insulator,
the engine is operating properly. A black coating on
the insulator usually means that the air cleaner is dirty.
Set the gap to 0.7 to 0.8 mm (0.028 to 0.031 inch).
g206628
Figure 47
Installing the Spark Plug
Important:
Ensure that the gap between the side
and center electrodes is correct before installing
the spark plug.
1.
Thread the spark plug clockwise into the
spark-plug hole by hand.
Note:
Avoid cross-threading the spark plug with
the threads of the spark-plug hole.
2.
Rotate the spark plug clockwise using the
designated spark-plug wrench until the plug and
sealing washer are seated (
3.
Tighten the spark plug as follows:
•
When installing an
in-service
spark plug,
tighten the plug an additional 1/8 to 1/4 turn.
•
When installing a
new
spark plug, tighten the
plug an additional 1/2 turn.
4.
Push the spark-plug wire onto the terminal of the
spark plug (
).
Cleaning the Spark Arrester
Service Interval:
Every 100 hours
Note:
A spark arrester is available as an option. If
you require a spark arrester, contact your Authorized
Toro Service Dealer.
Genuine Toro spark arresters are approved by the
USDA Forestry Service.
WARNING
If the engine has been running, the muffler
will be hot. Contact with hot surfaces may
cause personal injury.
Keep your hands, feet, face, clothing and
other body parts away from the muffler and
other hot surfaces until they have cooled.
1.
Park the machine on a level surface and shut
off the engine.
2.
Allow the engine to cool.
3.
Disconnect the wire from the spark plug; refer to
Disconnecting the Spark-Plug Wire (page 29)
.
4.
Remove the divider plate (if equipped); refer to
Removing the Divider Plate (page 29)
.
5.
Remove the 2 nuts (8 mm) and remove the
muffler from the cylinder (
).
Note:
The location and size of parts may be
different for your machine, but the procedure is
the same.
35
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